I'd have to look back over the *stats but as far as I can remember The Deli took a major chunk of BS cities. Obviously there were other alliances yes and I recall one of the Darks having great success too but if I am right Dark were two seperate entities initially before a merge?
* = It seemed that quite a few BS members were either kicked or left mid-conquer so to speak so the Stats actually do lie at first glance in some cases. (I personally took 3 BS members out in the initial encounters but the stats won't tell you that, I mentioned this to Kadjayuni and it became apparent that it was a bit of a trend, I believe he did some investigating and made an epic thread and youtube video regarding this
)
I tip my hat to BS though, they really did take on all-comers.